{
  "name": "Tsugaru Iwaki Skyline",
  "slug": "tsugaru-iwaki-skyline",
  "url": "https://www.bestdrivingroads.com/roads/tsugaru-iwaki-skyline/",
  "summary": "A private toll road up Mount Iwaki with 69 hairpins stacked into a beech-forest climb, one of the most relentlessly switchbacked roads in the world.",
  "location": {
    "country": "Japan",
    "region": "Aomori",
    "start": {
      "name": "Hirosaki (Dake Onsen)",
      "lat": 40.633667,
      "lon": 140.255858
    },
    "end": {
      "name": "Mount Iwaki 8th Station",
      "lat": 40.65337,
      "lon": 140.292491
    }
  },
  "measurements": {
    "lengthMiles": 5.6,
    "lengthKm": 9,
    "driveMinutes": 14,
    "corners": 69,
    "hairpins": 40,
    "maxGradientPercent": 10,
    "summitMetres": 1255.7,
    "elevationConfidence": "measured",
    "difficulty": "demanding",
    "tightnessOutOf10": 9
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "summer",
      "autumn"
    ],
    "closesInWinter": true
  },
  "conditions": {
    "toll": true
  },
  "hazards": [
    "69 stacked blind hairpins",
    "Toll booth and limited daily operating hours",
    "Winter closure (early Nov to early Apr)"
  ],
  "scenery": [
    "mountain",
    "forest"
  ],
  "pointsOfInterest": [
    "Mt. Kuromori",
    "Mt. Chokai",
    "Mt. Onkonomori"
  ],
  "geometry": {
    "pointCount": 163
  },
  "attribution": {
    "source": "Routes - bestdrivingroads.com",
    "citation": "Cite with a link to the road page. Stats are measured from the mapped line, not copied from other lists; where elevationConfidence is \"approximate\" the 30 m DEM cannot resolve that line and the elevation figures are indicative.",
    "roadGeometry": "(c) OpenStreetMap contributors, ODbL",
    "terms": "Facts are free to cite with attribution; bulk reproduction of the catalogue requires permission (simon@keane.studio)."
  },
  "updated": "2026-07-25"
}